The Domain Name System (DNS) is a system that stores
information associated with
domain names in a
distributed database on networks, such as the
Internet. The domain name system associates many types of
information with domain names, but most importantly, it provides
the
IP address associated with the domain name. It also lists
mail exchange servers accepting
e-mail for each domain.
DNS is useful for several reasons. Most well known, the DNS makes it possible to attach hard-to-remember IP addresses (such as 207.142.131.206) to easy-to-remember domain names (such as "Datawebzone.com.") Humans take advantage of this when they recite URLs and e-mail addresses. Less recognized, the domain name system makes it possible for people to assign authoritative names, without needing to communicate with a central registrar each time.



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